This picture taken on May 23, 2020 shows a laboratory baby monkey being examined by employees in the breeding centre for cynomolgus macaques (longtail macaques) at the National Primate Research Center of Thailand at Chulalongkorn University in Saraburi. After conclusive results on mice, Thai scientists from the centre have begun testing a COVID-19 novel coronavirus vaccine candidate on monkeys, the phase before human trials. (Photo by Mladen Antonov/AFP Photo)
